The Polyvance Plastic Welding Rod Assortment with Organizer Case (Tier 3), No. 5003-05, includes less-often-used, but important-to-have plastic welding rods. The organizer case is labeled in order to make it easier to identify the plastic welding rods and more convenient when it's time to reorder. This case includes 15 pieces of R08-01-XX-NT - PPE+PS (1/8" diameter, black), 10 pieces of R15-01-XX-BK - PA+PPE (GTX) (1/8" diameter, black), 10 pieces of R15-04-XX-BK - PA+PPE (GTX) (3/8" by 1/16", black), 10 pieces of R18-02-XX-BK - PP+GF15 (3/16" diameter, black), 10 pieces of R18-04-XX-BK - PP+GF15 (3/8" by 1/16", black), 15 pieces of R21-04-XX-BK - PA+GF15 (Nylon) (3/8" by 1/16", black), 15 pieces of R22-01-XX-BK - PPX (PPE+PP+GF30) (1/8" diameter, black).